Background: We conducted this study was to identify any difference in platelet-derived exosome micro-RNA (microRNA) profile between patients with in-stent restenosis and patients without restenosis using gene sequencing.Method: Platelet-derived exosomes(PDEs) were isolated through ultracentrifugation and validated by Western blotting, transmission electron microscope and NanoSight analysis. The platelet-derived exosome microRNA expression profile was identified by Illumina Hiseq2000/2500 sequencing, and validated by qRT-PCR. Finally, the potential functions of microRNAs were predicted using miRNA-gene-GO network and miRNA-gene-KEGG network. Result: We identified several differentially expressed platelet-derived exosome microRNAs. In particular, we found that the microRNA PC-3p-75179_24 was up-regulated, while hsa-miR-133a-3p_R+1 and hsa-miR-589-5p_R-1 were down-regulated in patients with in-stent restenosis which were further validated by qRT-PCR results. Our results also showed their potential miRNA-gene-GO and miRNA-gene-KEGG interaction.Conclusion: In summary, our study reveals for the first time microRNA expression is altered, in platelet-derived exosomes in patients with in-stent restenosis, with specific up-regulation of microRNA PC-3p-75179_24 and down-regulation of hsa-miR-133a-3p_R+1 and hsa-miR-589-5p_R-1. Our findings supports the need to explore the potential of these microRNAs as biomarkers and the pathological effects on in-stent restenosis.
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